Trolley.



PA-TBNTED- MAY '31, v1904;.

J. H." WL'KER'.-

TROLLEY. APPLIUATION FILED APR-.29, 1903.

No MODEL.

Arme/vers. 'Y

Patented May 31, 1904.

UNITED 'SiTQ/XTES PATENT OFFICE.

JOHN H wALKER, or LEXINGTON.' KENTUCKY.

TROLLEY.

, SPECIFICATION forming part of Letters Iatent No. 761,564, dated ivraysi, 1904.

l Applicaanfiiedaprii 29,1903. smaila. 154,341. N0m0aei.

To alZZ whom `t may concern; Y

Be it known that I, J oiINv H..WALKER, a citizen of the United States, and aresident of Lexington, in the county of Fayette and State of Kentucky, have made certain new and useful Improvements in Trolleys, of which the following is a'specication. A

My invention is an improvement in trolleys;

and itconsists in certain novel constructions and combinations of parts, as will be hereinafter described and claimed. l Y

Inl the drawings, Figure 1 is a .detail sectional View of the. trolley-wheel in place. in connection with the upper portion of the harp. Fig. 2is an elevationof-.the harp withthe Wheel and connected parts applied. Fig. v3 is a cross-section on line 3 3 of Fig.pl. Fig. Atis a side elevation' of a form of carrier-'block provided withl a spur-to prevent the wire from slipping between the wheel` and` prongs. Fig. 5 is. a detail perspective View of one of the carrier-blocks without such spur. Fig. 6 is a detail perspective view of the combined rnetallic and iexible gasket; Fig. 7 is a detail perspective Viewl of the plain gasket.

the end thrust-plates.y Fig. 9 is a similar View showing a modiiied form. of recess. Fig. 10 is a detail perspective view` of the upper portion of one of the forms of the harp, and Fig. 11 isa detail cross-section on line 11 11 of Fig. 2.' j

In carrying out my invention I constructthe harp' with the prongs A A, which are slotted The conductor-wire D is provided with the' branches D', whose upper ends are formed to produce the flat heads D2, Vwhich lap against the .inner sides ofthe prongs A andextend ,along the edges of the slots B and form conductor-bearings, against which lthe carrierblocks bear at'their outer sides, as will be understood from Figs. 1 and 2 of the drawings.

Fig.V 8 is a side elevation of the inner face. of one of I thuslrprovide broad flaticonducting-surface between the carrier-blocks and the headsof the branches of the conductor-wire, such conducting-surfaces extendingthroughoutthe greaterportion 0f, the outer'faces ofthe carrier-blocks, aswill be understood from Figs. landlO. f The carrier-blocks C are provided with bosses C to t in the slots B of the prongs and with the outwardly-projecting socketed stems C2', whichfare threadedI on their outer sides tov receive'v the .cap-nuts E and are recessed in their inner faces at C3 to -receive the thrust-plates or washers F, as shown inFig. 1. The sockets C* inthe stems C2 receive the bolt-head orl nut, as shown.: in Fig. ,1.while :the inner sockets C3 receive the thrust-plates or washers, which iit therein andhave a broad contact surface A with the carrier blocks. These carrier-blocks vand the thrust-plates or washers also have' a conducting contact with the bolt G, so that any current received by the central portionof the said bolt will be car-.

ried o through the thrust-plates and carrierblocks, as `will be.r understood froml Fig. 1. The thrust-plates are provided intheir inner vfaces with recesses for drylubricant, preferably graphite, in the'faceswhich contact with the opposite ends-ofthe wheel. In Fig. 8 VI show the recessesinfthe'form of circular grooveszF, which ,arel eccentric to the shaft G, so that as the wheelrevolves concentrically with the said shaft Gr, Iam able to avoid any tendency to form grooves in the ends of the vwheel by. reason of the grooves in the thrust-plates, as the end surfaces ofthe wheel moving over the eccentric grooves in the lthrust-plates will tend to grind-.smooth-at all times.` I therefore prefer to make the graphite-recesses in the eccentric form shownin Fig. 8; but manifestlyl the form of said'recesses may be varied. and they may, if desired, be in the .form shown in Fig. 9.

The wheel II has an oil-cavity I and a spring closing-valve J to facilitate supplying oil to the `"cavity I by meansy of an ordinary oilingcan or otherwise, as may be desired. This wheel has a hub-tube K, which may be suitably secured in the wheela'ndA is provided in its bore with spiral grooves K', supplied with IOO graphite and operating upon a bushing-tube L, which latter is keyed on the shaft G by means of the pin g on said shaft operating in the keyway or groove L of the bushing L, as will be-understood from Figs. l and 3 of the drawings. The bushing L is made shorter than `the hub-sleeve K, and washers M are provided upon the bolt G and fitting within the ends of the hub-tube K and against the ends of the bushing L, as shown in Fig. 1. The washers M, fitting against the ends of the bushing and within the ends of the hub-tube, decrease the length of bearing of said hubtube on the bushing and permit the hub-tube to extend at its ends into direct contact with the thrust-plates, as shown in Fig. 1. The washers M may be of the composite construction shown in Fig. 6, in which metallic washers M are secured on opposite sides of the flexible gasket M2, which latter may be of rawhide or other suitable material, or I may use plain rawhide or similar gaskets, as shown at N in Fig. 7 p

In the practical use of my invention the thrust-plates or washers and carrier-blocks may be made of copper, brass, or other material of high conductivity, and the current will be carried by practically a copper conductor from the wheel to the motor. It will also be noticed the construction is simple, and I arrange for avoiding any frictional wear upon the bolt or pin G. which extends from side to side of the trolley. This bolt G has a head G at one end and a suitable nut Gz at its other end, said bolt and nut being housed in the sockets of their respective carrierblocks and covered by the cap-nuts, as shownin Fig. 1.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The improvement in trolleys herein described, comprising the harp having its prongs slotted to receive the bosses on the carrierblocks, the carrier-blocks having bosses iitting in said slots, and provided at their outer sides vwith the socketed externally-threaded stems and having the recesses in their inner faces, the connecting-bolt extending from side to side of the trolley having the head at one end and the nut at the other end fitting in the outer sockets of their respective carrier-blocks, the

. cap-nuts on the stems of the carrier-blocks,

the thrust-plates or washers fitting in the inner sockets of the carrier-blocks, the bushing or tube keyed on the bolt, the washers on the bolt and fitting against the ends of the bushing, and the wheel having the hub-tube made longer than the bushing whereby it will fit over the washers, said wheel being arranged to turn upon the bushing and to bear at its ends against the thrust-plates, substantially as and for the purposes set forth.

2. The combination in a trolley, with the carrier-blocks, a connecting-bolt and the opposite thrust-plates of a wheel supported between and bearing at its ends against the said thrust-plates the carrier-block receiving said thrust-plates and supports for said blocks, substantially as set forth.

3. The combination of the harp-prongs, having openings for the carrier-blocks, the wheel, carrier-blocks fitting and held in the openings of the harp-prongs, devices outside the harp-prongs for securing said blocks, the shaft supported in the blocks and carrying the wheel, 'and intermediate devices between 'the wheel and carrier-blocks, substantially as set forth.

4. rlhe combination of the shaft, the wheel, the harp, the devices for supporting the shaft from the harp, the bushing on the shaft, and held from turning thereon, and a device connected with the wheel and inclosing the bushing, substantially as set forth.

5. The combination of the harp, the shaft means for supporting the shaft from the trolley-harp, the bushing held from turning on the shaft, the wheel turning on the bushing and projecting at its ends beyond the ends oi .said bushing and the thrust-plates at the opposite sides of the wheel, substantially as set forth.

6. The combination in a trolley, with the wheel, and the harp, of thrust-plates at the opposite sides of the wheel, and a bushing within and on which the wheel turns, said bushing being spaced at its ends away from the thrustplates, substantially as set forth.

7. The combination of the shaft, the bushing held from turning on the shaft, washers on the shaft and fitting against the ends of the bushing, the wheel having a hub-sleeve extending over the washers and turning on the bushing, and the thrust-plates at the ends of the wheel, substantially as set forth.

8. The combination of the trolley-harp, the carrier-blocks, means for securing the blocks to the harp, and thrust-plates, iitting within the carrier-blocks, the cross boltor shaft, the bushing held from turning thereon and a device inclosing said bushing between the thrustplates, and bearing against the latter, substantially as set forth.

9. The combination in a trolley with the harp and the wheel of a plate arranged to receive the thrust of the wheel and a block supported by the harp and carrying said plate.

JOHN H. WALKER.

Witnesses:

SoLoN C. KnMoN, PERRY B. TURPIN.

IOO

IIO 

